Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7726140 | Journal of Power Sources | 2018 | 7 Pages |
Abstract
Developing low cost and high efficient electrode for carbon dioxide (CO2) reduction in organic media is essential for practical application. Zn is a cheap metal and has high catalytic effects on CO2 reduction to carbon monoxide (CO) in aqueous solution. However, little attention has been given to investigate the performance of Zn in organic media for CO2 reduction. In present work, we have conducted CO2 reduction in propylene carbonate/tetrabutylammonium perchlorate on Zn due to that propylene carbonate is a widely used industrial absorber, and tetrabutylammonium perchlorate is a commonly used organic supporting electrolyte. In addition, because electrochemical reduction of CO2 to CO naturally produces H2O, we have discussed water effects on CO2 reduction in propylene carbonate/tetrabutylammonium perchlorate+6.8 wt % H2O. Our experiment results reveal that the faradaic efficiency for CO formation reaches to 83%, and the current density remains stable at 6.72â¯mA/cm2 at voltage â2.3â¯V for 4â¯h. Interestingly, Zn presents higher catalytic activity than Ag, and slightly lower than Au. X-ray photoelectron spectroscopy results confirm that no poisonous species is formed and absorbed on the cathode, which is an important advantage in practical application.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Feng-xia Shen, Jin Shi, Tian-you Chen, Feng Shi, Qing-yuan Li, Jian-zheng Zhen, Yun-fei Li, Yong-nian Dai, Bin Yang, Tao Qu,